RCOND

Purpose:

Estimates the reciprocal condition number of a square matrix.

Syntax:

RCOND(a)

A square matrix.

Returns:

A real, the estimated reciprocal condition number.

Example:

W1: {{1, 2, 3},

{4, 5, 6},

{7, 8, 9}}

W2: {{1, 2, 3},

{4, 5, 6},

{7, 8, 0}}

rcond(W1) == 1.54198E-018

rcond(W2) == 0.0193548

Remarks:

If the input array is well conditioned, the reciprocal condition number is near 1. If the input is ill conditioned, the reciprocal condition number is near 0.